Tag: magnetic effects of electric current
Questions Related to magnetic effects of electric current
Dry cell is a source of
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Direct current
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Alternating current
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Can be used as direct current source or alternating current source
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Cant say
Dry cells produces direct current .
In the direct current:
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The direction of current is always positive
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The direction of current is always negtive
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The direction of current changes constantly
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The direction of current is always in the same direction
D
Direct current is an electric current generated by the charge carriers (electrons)
that are flowing in only one direction. So, the DC current flows only in one
direction. DC current is produced be the sources such as batteries, thermocouple,
fuel cells, solar cells.
The current in the armature of a motor is reversed every half cycle due to the action of on:
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armature
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field coil
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brush
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commutator
What is the voltage of the electricity that is generally supplied to a house ?
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$400 V$
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$200 V$
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$220 V$
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$260 V$
Worldwide, many different mains power systems are found for the operation of household and light commercial electrical appliances and lighting. The different systems are primarily characterized by the following.
- Voltage
- Frequency
- Plugs and sockets (receptacles or outlets)
- Earthing system (grounding)
- Protection against overcurrent damage (e.g., due to short circuit), electric shock, and fire hazards.
- Parameter tolerances.
In India, a voltage of nearly 220 volts and a frequency of 50 cycles per second is used.
In a dry cell
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Chemical energy is converted into heat
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Electrical energy is converted into electrical energy
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Chemical energy is converted into electrical energy
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Chemical energy is constant
A Dry cell is a type of electricity producing chemical cell, commonly used for many home and portable devices , often in the form of batteries. it was developed in 1886 by German scientist Carl Gassner.
Secondary cells are also knows as
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Electrolyte
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Accumulators
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Dry cell
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All
Secondary cells also provide current as a result of chemical reaction, but they can be recharged after use because in these cells, the chemical reaction is reversible.
Which of the following is a source of direct current.
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Cell
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Electromagnet
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Bulb
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Switch
Source of direct current are the cells. In a cell, the chemical energy changes in to the electrical energy when it sends current in a circuit.
The function ${\sin}^{2}{\omega t}$ represents:
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a periodic, but not simple harmonic, motion with a period $2\pi/\omega$
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a periodic, but not simple harmonic, motion with a period $\pi/\omega$
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a simple harmonic motion with a period $2\pi /\omega$
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a simple harmonic motion with a period $\pi /\omega$
The frequency of A.C mains in India is
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$30c/s$
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$50c/s$
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$60c/s$
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$120c/s$
In India the frequency of A.C current is $50$Hz.
In the direct current
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The direction of current is always positive
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The direction of current is always negative
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The direction of current changes constantly
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The direction of current is always in the same direction.
In the direct current, the direction of current is always in the same direction.